KR20140010887A - Insulation inspection method and insulation inspection apparatus - Google Patents

Abstract

(Purpose) Provided are an insulation inspection method and an insulation inspection device capable of accurately detecting a spark failure without getting affected by contact resistance interposed between a contactor and a wiring pattern. (Method of solution) The insulation inspection method performs an insulation inspection of a substrate, in which multiple wiring patterns are formed, by performing transmission and reception of an electric signal through a conductive contactor which is pressure welded on a predetermined inspection point on a wiring pattern. The insulation inspection method chooses one wiring pattern as an object to be inspected as a first inspection part, among multiple wiring patterns; and chooses all remaining wiring patterns, excluding the first inspection part, to become objects to be inspected as a second inspection part. The insulation inspection method supplies power through a contactor connected with the first inspection part to supply the power for performing an insulation inspection between the first and second inspection parts. The insulation inspection method detects voltage through a contactor, which is different to the contactor which is connected with the first inspection part and supplies the power, to detect the voltage between the first and second inspection parts. The insulation inspection method determines the insulation state between the first and second inspection parts based on a detection result of the power. [Reference numerals] (10) Display part; (6) Control part; (61) Selection part; (62) Determination part; (63) Memory part

Description

INSULATION INSPECTION METHOD AND INSULATION INSPECTION APPARATUS

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulation inspection method for a substrate on which a plurality of wirings are formed and an insulation inspection apparatus thereof, and in particular, an insulation capable of detecting accurate spark defects without being affected by the contact resistance interposed between the contact and the wiring pattern. An inspection method and an insulation inspection apparatus.

Conventionally, the insulation inspection of the board | substrate which has a some wiring pattern determines whether the board | substrate is a good quality goods or a defective product by judging whether the insulation state between wiring patterns (enough insulation is ensured).

In such an insulation inspection apparatus, by applying a relatively high voltage (for example, 200 V) between two wiring patterns to be inspected, the resistance value between the wiring patterns is calculated and based on the resistance value, Judging whether or not.

This inventor proposes the insulation inspection apparatus described in patent document 1 as such an insulation inspection apparatus. In this insulation inspection apparatus, even if a spark (discharge) occurs between the wiring patterns during the insulation inspection, the sparks can be detected to accurately detect a defect between the wiring patterns.

However, with the miniaturization and complexity of the substrate, the miniaturization and complexity of the wiring patterns themselves have progressed, and it has become difficult to determine the quality of the insulation state between the wiring patterns. For example, in the insulation inspection method of Patent Literature 1, the voltage source 2 for supplying voltage application for conducting insulation inspection and the voltmeter 3 for detecting spark are conducting contact with the wiring pattern through a common probe. I'm making it. For this reason, the contact resistance of a probe and a wiring pattern generate | occur | produces, but the case where the voltage between wiring patterns cannot be detected correctly by this contact resistance has arisen.

More specifically, as described above, the test voltage between the wiring patterns is supplied through the probe, and the test voltage is also applied to the contact resistance in the process of supplying the test voltage. Will change. For this reason, the contact resistance value is different before the test voltage supply and at the test voltage supply, and the change is measured by the voltmeter. In particular, when the contact resistance value becomes small, the same voltage change as the spark is detected, and the pseudo It had a problem of judging as defective.

Japanese Patent Publication No. 3546046

As mentioned above, the proposal of the board | substrate inspection method and board | substrate inspection apparatus which detect a spark defect correctly, without detecting a pseudo spark at the time of the insulation inspection between wiring patterns is calculated | required.

Invention of Claim 1 is an insulation inspection apparatus which performs the insulation test of the board | substrate which has a some wiring pattern by transmitting / receiving an electric signal through the electrically-conductive contact | contact_contacted to the test point set previously on a wiring pattern, Selecting means for selecting one wiring pattern to be an inspection object from the plurality of wiring patterns as a first inspection portion, and arranging all wiring patterns to be inspection objects other than the first inspection portion in parallel and electing the second inspection portion; In order to set a predetermined potential difference between the first inspection unit and the second inspection unit, one terminal is electrically connected to the first inspection unit through a contactor, and the other terminal is electrically connected to the second inspection unit through a contactor. In order to measure the voltage value between the power supply means and the first inspection unit and the second inspection unit, one terminal is connected via a contactor. Between the first inspection unit and the second inspection unit on the basis of the detection result of the voltage detection means and the voltage detection means connected to the first inspection unit and the other terminal to be conductively connected to the second inspection unit through a contactor. It is provided with the determination means for determining the quality of an insulated state, The contactor electrically connected with the one terminal of the said power supply means, and the contactor electrically connected with the one terminal of the said voltage detection means are different contactors, It is characterized by the above-mentioned. Provide an inspection device.

Invention of Claim 2 is an insulation test | inspection apparatus of Claim 1 WHEREIN: The said 1st test part uses the contactor connected to one terminal of the said power supply means, and the contactor connected to one terminal of the said voltage detection means. It provides an insulation inspection apparatus characterized in that the conduction inspection of the.

Invention of Claim 3 is an insulation inspection method which performs the insulation test of the board | substrate with which the some wiring pattern is formed by transmitting and receiving an electrical signal through the electrically conductive contact | contact_contacted to the inspection point preset on a wiring pattern. And selecting one wiring pattern to be inspected from the plurality of wiring patterns as the first inspection unit, and selecting all the wiring patterns to be inspection other than the first inspection unit as the second inspection unit, and selecting the first inspection unit. In order to supply electric power for conducting an insulation test between the first test part and the second test part, the electric power is supplied through a contactor connected to the first test part, and a voltage between the first test part and the second test part is detected. In order to check the voltage through a contact different from the contact for connecting the first inspection unit and supplying the electric power, And an insulation state between the first inspection unit and the second inspection unit is determined based on the detection result of the electric power.

According to invention of Claim 1 and 3, a 1st test part and a 2nd test part are used for the contact for power supply used for the insulation test between a 1st test part and a 2nd test part, using a different contactor from the contact for voltage measurement. Since the inspection of the insulation state is carried out, insulation inspection can be performed without being influenced by the wiring pattern and the contact resistance of the contactor. Therefore, a test voltage is applied between the test targets to perform the insulation test, and even if the contact resistance value changes according to the change of the test voltage, the voltage change is accurately detected without affecting the voltage detecting means of the measuring system. can do.

According to the invention described in claim 2, since each of the two contacts subjected to the conduction inspection to the first inspection unit is used, the insulation inspection can be performed in a state where the conduction inspection is good, and the insulation inspection can be performed more accurately.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows one Embodiment of the insulation inspection apparatus which concerns on this invention.
2 is an embodiment showing an operating state of the insulation inspection apparatus according to the present invention.
3 is another embodiment showing an operating state of the insulation inspection apparatus according to the present invention.

The insulation inspection apparatus and insulation inspection method which concern on this invention are demonstrated, referring an accompanying drawing.

The term "substrate" described in this application document is not limited to a printed wiring board, but is, for example, a flexible board, a multilayer wiring board, a component embedded board, an electrode plate for a liquid crystal display or a plasma display, and a package for a semiconductor package. The board | substrate with which various wiring, such as a board | substrate and a film carrier, is formed generically. That is, the board | substrate includes all the board | substrates which can be a target of insulation test.

1 is a schematic configuration diagram of an embodiment of an insulation inspection apparatus according to the present invention.

The insulation inspection apparatus 1 which concerns on this invention is the power supply means 2, the voltage detection means 3, the current detection means 4, the control means 6, the switching means 7, and the current supply terminal 8. , The voltage detecting terminal 9 and the display means 10 are provided.

In embodiment shown by FIG. 1, the insulation inspection apparatus 1 of this invention, the board | substrate CB in which the wiring pattern used as the test object is formed, and the insulation inspection apparatus 1 and the board | substrate CB are electrically connected. Contactor CP is shown. The contactor CP is press-contacted so that it may be electrically connected with the inspection point of the wiring pattern P which is preset, and each contactor CP is arrange | positioned with respect to a some inspection point. These contacts CP connect the insulation inspection apparatus 1 and the board | substrate CB so that it can electrically conduct.

The board | substrate CB shown in FIG. 1 has three wiring patterns P1-P3. In addition, the number and shape of the wiring patterns which this board | substrate CB has are set suitably according to the board | substrate CB to be designed.

As for the three wiring patterns of the board | substrate CB of FIG. 1, the single-shaped wiring pattern P1, the T-shaped wiring pattern P2, and the one-shaped wiring pattern P3 are shown. In this FIG. 1, the seven contactor CP which electrically contacts each wiring pattern P1-P3 is shown. In the embodiment of FIG. 1, both ends of the wiring pattern P1 are set as inspection points, three shortcomings of the wiring pattern P2 are set as inspection points, and both ends of the wiring pattern P3 are checked points. The state which is set as follows is shown. In addition, in the wiring patterns P2 and P3, the state which only one contactor CP is connected to the insulation inspection apparatus is shown for convenience of description, and the connection of the other contactor CP is abbreviate | omitted. Moreover, each contactor CP has the structure connected with the upstream current supply terminal 81, the downstream current supply terminal 82, and the upstream voltage detection terminal 91 which are all mentioned later.

The power supply means 2 applies a predetermined voltage for performing the insulation inspection between the wiring pattern to be inspected and the other wiring pattern (hereinafter, between the inspection objects). The power supply means 2 can use, for example, a current controller, but is not particularly limited and can be used as long as a predetermined voltage can be applied between inspection objects. In the case of using the current controller, the power supply means 2, which is the current controller, supplies a current to a predetermined wiring pattern and applies a predetermined voltage between inspection objects. The voltage applied by the power supply means 2 is set to 200 to 250 V, for example.

This power supply means 2 can apply a predetermined voltage between inspection objects by the operation of the switch element SW1 and the switch element SW3 described later. In Fig. 1, one terminal (plus terminal) on the upstream side (plus side) of the power supply means 2 is designated via a contactor CP designated by ON / OFF operation of the switch element SW1. The conductive pattern is connected to the wiring pattern. In addition, the other terminal (negative terminal) on the downstream side (negative side) of the power supply means 2 conducts with the designated wiring pattern through the contactor CP designated by the ON / OFF operation of the switch element SW3. Will be connected. In addition, although the other terminal of the power supply means 2 is grounded and connected to the switch element SW3 via the current detection means 4 in FIG. 1, you may connect directly to the switch element SW3.

The voltage detection means 3 detects the voltage between inspection objects. Although this voltage detection means 3 can use a voltmeter, it does not specifically limit, for example, What is necessary is just to be able to detect the voltage between test objects. By using the voltage value detected by this voltage detection means 3 and the current value supplied by the power supply means 2, the resistance value between inspection objects can be calculated. In addition, by using this resistance value, the insulation between inspection objects can be inspected. Further, the voltage value detected by the voltage detecting means 3 is set so as to perform operation control of the power supply means 2.

The voltage detection means 3 can measure the voltage value between inspection objects by the operation of the switch element SW2 and the switch element SW3. In Fig. 1, one terminal (plus side terminal) on the upstream side (plus side) of the voltage detecting means 3 is designated via a contactor CP designated by ON / OFF operation of the switch element SW2. The conductive pattern is connected to the wiring pattern. In addition, the other side terminal (minus side) of the downstream side of the voltage detecting means 3 (minus side terminal) is connected to the designated wiring pattern through the contactor CP designated by the ON / OFF operation of the switch element SW3. It will be connected electrically. In addition, although the other terminal of the voltage detection means 3 is grounded and connected to the switch element SW3 via the current detection means 4 in FIG. 1, you may connect directly to the switch element SW3.

When one wiring pattern is elected as the first inspection unit, one terminal (plus side terminal) of the power supply means 2 and one terminal (plus side terminal) of the voltage detecting means 3 are connected to the wiring pattern. The contact is made through the contactor. In this case, one terminal of the power supply means 2 is connected to the wiring pattern elected as a 1st inspection part, and the switch element SW1 turns ON. In addition, although one terminal of the voltage detecting means 3 is connected to the conductive pattern with the wiring pattern selected as the first inspection unit when the switch element SW2 is ON, at this time, the conductive element is connected to one terminal of the power supply means 2. The contact pattern is electrically connected to the wiring through a separate contact without using the contactor.

The current detection means 4 detects a current between inspection objects. The current detection means 4 can use an ammeter, for example, but it is not specifically limited, What is necessary is just to be able to detect the electric current value which flows between test objects. In addition, although the current value supplied by the power supply means 2 can also be determined, the current value between inspection objects can also be detected by using this current detection means 4. Based on the current value detected by this current detection means 4, the resistance value between inspection objects is calculated. Moreover, based on this detected resistance value, pass / fail of the insulation state between test objects is determined.

The voltage value and current value detected by the voltage detecting means 3 and the current detecting means 4 are transmitted to the control means 6 described later. At this time, in addition to the voltage value and current value information, elapsed time information or the like is provided and transmitted (as time series information).

The current supply terminal 8 is connected through each wiring pattern P and the contactor CP in order to supply current between inspection objects. The current supply terminal 8 includes an upstream current supply terminal 81 for connecting one terminal of the power supply means 2 and the wiring pattern, the other terminal of the power supply means 2 or the current detection means 4 and the wiring. The downstream current supply terminal 82 which connects the pattern P is provided. As shown in FIG. 1, the upstream current supply terminal 81 and the downstream current supply terminal 82 of this current supply terminal 8 are formed with respect to each wiring pattern P. As shown in FIG. These upstream side current supply terminals 81 and downstream side current supply terminals 82 each have a switch element SW of the switching means 7, and the switch element SW of the switching means 7 is provided. By the ON / OFF operation, the connected state / not connected state is set.

In addition, in FIG. 1, this current supply terminal 8 is arrange | positioned with the resistance for electrostatic discharge protection.

The voltage detection terminal 9 is connected through each wiring pattern P and the contactor CP in order to detect the voltage between inspection objects. This voltage detection terminal 9 has an upstream voltage detection terminal 91 for connecting one terminal of the voltage detection means 3 and the wiring pattern P. As shown in FIG. In addition, although not shown in FIG. 1, you may have the downstream voltage detection terminal which connects the other terminal of the voltage detection means 3 with the wiring pattern P. As shown in FIG. In FIG. 1, the upstream voltage detection terminal 91 of this voltage detection terminal 9 is formed with respect to each wiring pattern P. As shown in FIG. This upstream side voltage detection terminal 91 and the downstream side voltage detection terminal which are not shown have the switch element SW of the switching means 7 in the same way as the current supply terminal 8, and this switching means ( By the ON / OFF operation of the switch element SW of 7), the connected state / not connected state is set.

As shown in FIG. 1, the current supply terminal 8 and the voltage detection terminal 9 have three terminals arranged with respect to one contactor CP in conductive contact with the wiring pattern P. Three switch elements SW for controlling ON / OFF of the terminal are provided. 1, the switch element which controls the operation of the upstream current supply terminal 81 is code | symbol SW1, and the switch element which controls the operation of the upstream voltage detection terminal 91 is symbol SW2, and is downstream The switch element which controls the operation | movement of the electric current supply terminal 82 is shown with code | symbol SW3.

The switching means 7 is comprised by the some switch element SW electrically connected to each said contactor CP. This switching means 7 controls the operation | movement of ON / OFF by the operation signal from the control means 6 mentioned later.

The control means 6 selects the wiring pattern P to be inspected, detects the spark on the basis of the voltage value from the voltage detection means 3 from the power supply means 2, or the switching means 7. Send an instruction signal of the operation of.

This control means 6 is equipped with the selection means 61, the determination means 62, and the storage means 63, as shown in FIG.

The memory | storage means 63 memorize | stores the information about the wiring pattern P of the board | substrate CB, the information about the inspection point of this wiring pattern P, and the information of the detected detection value. Information necessary for insulation inspection is stored in this storage means 63. By using these information, insulation inspection is performed, and each detected value detected is stored.

The electoral means 61 selects the wiring pattern P to be inspected from the plurality of wiring patterns P of the substrate CB, and specifies the wiring pattern P to be inspected. By selecting the wiring pattern P which is the inspection object, the selection means 61 selects a wiring pattern to be subjected to insulation inspection sequentially.

As a method of selecting a wiring pattern to be inspected by the selecting means 61, the order of the wiring pattern to be inspected is set in advance in the storage means 63, and the method of selecting a wiring pattern to be inspected according to the order is described. It can be illustrated. Although this selection method can employ | adopt the above methods, it will not specifically limit, if it is a method in which the wiring pattern used as a test object is selected in order.

Election of the specific wiring pattern implemented by this selecting means 61 is performed by using the switching means 7. For example, by performing ON / OFF control of each switch element SW of the switching means 7, it is possible to select a wiring pattern to be inspected. In this insulation inspection apparatus, the switch element SW1 is turned ON so that the wiring pattern to be inspected is connected to the upstream current supply terminal 81 for connecting with the power supply means 2. At the same time, the switch element SW1 is different from the contactor CP to which the switch element is electrically connected and is connected to the upstream side voltage detection terminal 91 of the other contactor CP that is electrically connected to the wiring pattern. SW2) is turned ON. For this reason, although the wiring pattern of the 1st test | inspection part is in the state which the one terminal of the power supply means 2 and the one terminal of the voltage detection means 3 are in conducting connection, it will be electrically conductingly connected through the different contactor CP, respectively.

At this time, the selection means 61 selects a group of wiring patterns to be the second inspection unit. As for the wiring pattern selected as the second inspection unit, the switch element SW3 is turned ON, and the power supply means 2 is selected. The other end of (and the other end of the voltage detecting means 3) and the current detecting means 4 are connected in series.

For example, in the embodiment shown in FIG. 1, when the wiring pattern P1 is the inspection object, the electoral means 61 is connected to the upstream current supply terminal 81 connected to the wiring pattern P1, and An upstream side voltage detection terminal 91 is connected to the upstream side current supply terminal 81 and the contactor which is not electrically connected. The switch element SW1 and the switch element SW2 of these terminals 81 and 91 are selected. Send a signal urging it to turn on. When the switching means 7 receives this signal, the switch element SW1 and the switch element SW2 operate. In this case, a signal for prompting the switch element SW3 corresponding to the wiring pattern (resting wiring pattern) other than the wiring pattern to be inspected to be turned on is transmitted.

As described above, the electoral means 61 selects the wiring pattern P to be inspected from the plurality of wiring patterns P of the substrate CB. As for the wiring pattern P which the selection means 61 of the insulation inspection apparatus 1 shown in this embodiment selects, one wiring pattern P is selected from the some wiring pattern formed on the board | substrate CB. That is, insulation test | inspection is performed between one wiring pattern P selected by the selection means 61, and all the other wiring patterns P. As shown in FIG. Thus, by selecting the wiring pattern P, insulation inspection can be processed efficiently.

The determination means 62 receives voltage value information from the voltage detection means 3, and determines the generation of a spark based on this voltage value information. The spark determination method performed by this judging means 62 detects a voltage value from the time when the voltage starts being applied by the power supply means 2 to a predetermined timing, and the voltage value originates from the spark. Can be determined by whether or not a voltage drop occurs.

The determination means 62 may be set so as to determine the insulation state between inspection objects. In this case, the determination means 62 calculates the resistance value between the inspection objects based on the detected current value information and the applied voltage value information between the inspection objects stored in the storage means 63, and based on this calculation result. The determination is made. In this case, the determination means 62 stores the predetermined reference value information in the storage means 63, for example, and compares the calculation result information with the reference value information to determine the insulation state between the inspection objects. Conduct. In addition, this determination result is stored in the storage means 63.

The display means 10 displays the insulation inspection state. This display means 10 displays the discovery of a spark.

The above is description of the structure of the insulation inspection apparatus 1 of 1st Embodiment which concerns on this invention.

The operation of the insulation inspection apparatus 1 of the first embodiment will be described.

First, the information and the like of the wiring pattern P of the substrate CB to be inspected are stored in the storage means 63. Next, the board | substrate CB is arrange | positioned at a predetermined | prescribed inspection position, and the contactor CP is arrange | positioned at the test | inspection point on the wiring pattern P formed on the board | substrate CB.

Here, the conduction inspection of the wiring pattern P is normally performed for the board | substrate CB. The conduction test of this wiring pattern P calculates the resistance value between inspection points set previously on the wiring pattern P, and determines the quality of the conduction state between these inspection points based on this calculation result. The board | substrate CB becomes an insulation test | inspection after all the test | inspection of the some wiring pattern in which the conduction | conduction test | inspection set in advance is performed.

When the conduction inspection of all the wiring patterns P is complete | finished, the insulation inspection of the board | substrate CB is started next. In this case, the selection means 61 selects the wiring pattern P which is the 1st inspection part used as a test object. When the selection means 61 elects the wiring pattern P of the first inspection unit to be inspected, the selection means 61 is an upstream side of the wiring pattern P elected to the switching means 7 as the inspection object. The current supply terminal 81 is specified. At the same time, the contactor CP which is not electrically connected to the upstream side current supply terminal 81 of the wiring pattern P and is also connected to the wiring pattern P is identified, and the contactor CP and The upstream side voltage detection terminal 91 which can be connected is specified. The operation signal is switched from the selection means 61 so that the switch elements SW1 and SW2 for bringing this identified upstream current supply terminal 81 and the upstream voltage detection terminal 91 into a connected state are turned on. Is sent to (7). At this time, as the second inspection unit, wiring patterns P other than the wiring pattern P of the first inspection unit are selected, and the switch element SW3 of these wiring patterns P is specified. Then, the operation signal is transmitted from the selection means 61 to the switching means 7 so that these switch elements SW3 are turned on.

When the switching means 7 receives a signal relating to the ON / OFF operation of the switch element from the selection means 61, the ON / OFF control of the switch element SW is performed in accordance with this signal.

For example, when the wiring pattern P1 becomes the wiring pattern of the 1st test | inspection part of a test object, the upstream current supply connected with the contact point CP electrically connected with the test point corresponding to the one end of the wiring pattern P1. The switch element SW1 is selected so that the terminal 81 conducts with the wiring pattern P1, and the contactor CP (upstream side current supply terminal 81 connected to the conduction point connected to the inspection point corresponding to the other end of the wiring pattern P1). The switch element SW2 is elected so that the upstream side voltage detection terminal 91 of the contactor CP different from the contactor CP to which the () is conductively connected is connected to the wiring pattern P1. The selected switch element SW1 and the switch element SW2 are turned ON.

At this time, at the same time, in order for the contacts CP contacting the wiring pattern P2 and the wiring pattern P3 other than the wiring pattern P1 to be connected with the downstream current supply terminal 82, respectively, The switch element SW3 of the downstream current supply terminal 82 is elected to be turned ON, and operation is controlled (see Fig. 2). In addition, in FIG. 2, the switch element SW is turned OFF for all the contacts CP corresponding to test points other than said wiring pattern P2 and wiring pattern P3.

When the insulation inspection when the wiring pattern P1 is selected as the first inspection unit shown in FIG. 2 is performed, the next wiring pattern P2 is elected as the first inspection unit, and the following insulation inspection is performed. In this case, the wiring pattern P2 is selected as the first inspection unit, and the wiring pattern P1 and the wiring pattern P3 are selected as the second inspection unit.

At this time, since the wiring pattern P2 is selected as the first inspection portion, for example, the switch element SW1 corresponding to the contactor CP electrically connected to the inspection point at the left end of the T-shaped wiring pattern P2. Is turned on, and is electrically connected with one terminal of the power supply means 2. Moreover, the switch element SW2 corresponding to the contactor CP which is electrically connected to the test point at the right end of the T-shaped wiring pattern P2 is turned on, and is electrically connected to one terminal of the voltage detecting means 3. Also in this case, the power supply means 2 and the voltage detection means 3 are electrically connected via different contactors CP. Moreover, if such conditions are satisfied, the switch element SW corresponding to the contactor CP electrically connected to the inspection point of the lower end of the T-shaped wiring pattern P2 may be ON-controlled.

When the wiring pattern P2 is selected as the first inspection unit, the wiring pattern P1 and the wiring pattern P3 are selected as the second inspection unit. At this time, the wiring element P1 and the wiring pattern P3 are each connected to the switch element SW3 such that at least one of the contacts CP corresponding to the inspection point set at each of them is connected to the downstream current supply terminal 82. ON. In FIG. 3, the switch element SW3 connected to the contactor CP corresponding to the inspection point of the upper end of the wiring pattern P1 is turned ON, and the contactor CP corresponding to the inspection point of the left end of the wiring pattern P3 is turned on. ) Is connected to the switch element SW3.

In this way, the first inspection unit and the second inspection unit are set, all the wiring patterns P are selected to the first inspection unit, and the inspection is finished.

According to this invention, when the 1st test | inspection part and the 2nd test | inspection part which form the space between test objects are selected, and the switch element SW is set, insulation test | inspection is performed. At this time, although the contact resistance exists in the contactor CP and the wiring pattern P, one terminal of the power supply means 2 and one terminal of the voltage detection means 3 become a 1st inspection part like this invention. When connected to the wiring pattern P, since it is electrically connected through different contacts CP, even if electric power is supplied from one terminal of the power supply means 2 and the contact resistance changes, the voltage detection means 3 It does not affect the case. For this reason, when the spark is detected by observing the change of the voltage during the insulation inspection, the voltage detecting means 3 can accurately measure the voltage without being affected by the contact resistance caused by the current supply.

1: insulation inspection device
2: power means
3: voltage detection means
4: current detection means
61: means of election
CP: Wiring Pattern

Claims (3)

An insulation inspection apparatus for performing electrical insulation transmission and reception of a substrate having a plurality of wiring patterns by transmitting and receiving an electrical signal through a conductive contact press-contacted to an inspection point set in advance on a wiring pattern,
Selecting means for selecting one wiring pattern to be an inspection object from the plurality of wiring patterns as a first inspection portion, and arranging all the wiring patterns to be inspection objects other than the first inspection portion in parallel and electing the second inspection portion; ,
In order to set a predetermined potential difference between the first inspecting section and the second inspecting section, one terminal is electrically connected to the first inspecting section through the contactor, and the other terminal is electrically connected to the second inspecting section through the contactor. Sudan,
In order to measure the voltage value between the first inspection section and the second inspection section, one terminal is electrically connected to the first inspection section via a contactor, and the other terminal is electrically connected to the second inspection section through the contactor. Sudan,
And determining means for determining whether the insulation state is between the first inspecting portion and the second inspecting portion based on the detection result of the voltage detecting means,
A contactor electrically connected to one terminal of the power supply means and a contactor electrically connected to one terminal of the voltage detecting means are different contactors. The method of claim 1,
The conduction inspection of the said 1st inspection part is performed using the contactor electrically connected with the one terminal of the said power supply means, and the contactor electrically connected with the one terminal of the said voltage detection means, The insulation inspection apparatus characterized by the above-mentioned. An insulation inspection method for performing an insulation inspection of a substrate on which a plurality of wiring patterns are formed by transmitting and receiving an electrical signal through a conductive contact press-contacted to an inspection point preset on a wiring pattern.
From the plurality of wiring patterns, one wiring pattern to be inspected is selected as the first inspection unit, and all wiring patterns to be inspected other than the first inspection unit are selected as the second inspection unit,
Supplying the electric power through a contactor connected with the first inspection unit to supply electric power for conducting an insulation inspection between the first inspection unit and the second inspection unit,
In order to detect the voltage between the first inspection unit and the second inspection unit, the voltage is detected through a contactor connected to the first inspection unit and different from the contactor for supplying power,
And an insulation state between the first inspection unit and the second inspection unit is determined based on the detection result of the electric power.

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